#!/usr/bin/env python
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import unittest

# get mock from pypi as 'mock'
from mock import Mock, patch

from rqt_dep.dotcode_pack import RosPackageGraphDotcodeGenerator


PKG = 'rqt_deps'


class DotcodeGeneratorTest(unittest.TestCase):

    def test_packages_only(self):
        with patch('rospkg.RosPack') as rospack:
            with patch('rospkg.RosStack') as rosstack:
                factoryMock = Mock()
                graphMock = Mock()
                rospack.list.return_value = []
                rosstack.list.return_value = []
                factoryMock.get_graph.return_value = graphMock
                gen = RosPackageGraphDotcodeGenerator(rospack, rosstack)
                graph = gen.generate_dotcode(factoryMock)

                rospack.list.assert_any_call()
                rosstack.list.assert_any_call()
                factoryMock.get_graph.assert_called_with(
                    simplify=True, rank='same', ranksep=0.2, rankdir='TB')
                factoryMock.create_dot.assert_called_with(graphMock)


if __name__ == '__main__':
    import rosunit
    rosunit.unitrun(PKG, 'test_packages_only', DotcodeGeneratorTest)
